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splay-tree.h (splay_tree_max): New function.

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* splay-tree.h (splay_tree_max): New function.
	(splay_tree_min): Likewise.

From-SVN: r41895
This commit is contained in:
Mark Mitchell 2001-05-07 15:45:24 +00:00 committed by Mark Mitchell
parent b73bff7e3f
commit 5cdba4ff5f
6 changed files with 90 additions and 8 deletions
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5
gcc/cp/ChangeLog
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@ -1,3 +1,8 @@
2001-05-07 Mark Mitchell <mark@codesourcery.com>
* splay-tree.h (splay_tree_max): New function.
(splay_tree_min): Likewise.
2001-05-03 Geoffrey Keating <geoffk@redhat.com>
* cp-tree.h (enum cp_tree_index): Add CPTI_PFN_VFLAG_IDENTIFIER.

43
gcc/cp/class.c
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@ -208,7 +208,7 @@ static tree dfs_get_primary_binfo PARAMS ((tree, void*));
static int record_subobject_offset PARAMS ((tree, tree, splay_tree));
static int check_subobject_offset PARAMS ((tree, tree, splay_tree));
static int walk_subobject_offsets PARAMS ((tree, subobject_offset_fn,
tree, splay_tree, int));
tree, splay_tree, tree, int));
static void record_subobject_offsets PARAMS ((tree, tree, splay_tree, int));
static int layout_conflict_p PARAMS ((tree, tree, splay_tree, int));
static int splay_tree_compare_integer_csts PARAMS ((splay_tree_key k1,
@ -3822,20 +3822,30 @@ check_subobject_offset (type, offset, offsets)
/* Walk through all the subobjects of TYPE (located at OFFSET). Call
F for every subobject, passing it the type, offset, and table of
OFFSETS. If VBASES_P is non-zero, then even virtual non-primary
bases should be traversed; otherwise, they are ignored. If F
returns a non-zero value, the traversal ceases, and that value is
returned. Otherwise, returns zero. */
bases should be traversed; otherwise, they are ignored.
If MAX_OFFSET is non-NULL, then subobjects with an offset greater
than MAX_OFFSET will not be walked.
If F returns a non-zero value, the traversal ceases, and that value
is returned. Otherwise, returns zero. */
static int
walk_subobject_offsets (type, f, offset, offsets, vbases_p)
walk_subobject_offsets (type, f, offset, offsets, max_offset, vbases_p)
tree type;
subobject_offset_fn f;
tree offset;
splay_tree offsets;
tree max_offset;
int vbases_p;
{
int r = 0;
/* If this OFFSET is bigger than the MAX_OFFSET, then we should
stop. */
if (max_offset && INT_CST_LT (max_offset, offset))
return 0;
if (CLASS_TYPE_P (type))
{
tree field;
@ -3862,6 +3872,7 @@ walk_subobject_offsets (type, f, offset, offsets, vbases_p)
offset,
BINFO_OFFSET (binfo)),
offsets,
max_offset,
vbases_p);
if (r)
return r;
@ -3877,6 +3888,7 @@ walk_subobject_offsets (type, f, offset, offsets, vbases_p)
offset,
DECL_FIELD_OFFSET (field)),
offsets,
max_offset,
/*vbases_p=*/1);
if (r)
return r;
@ -3896,11 +3908,17 @@ walk_subobject_offsets (type, f, offset, offsets, vbases_p)
f,
offset,
offsets,
max_offset,
/*vbases_p=*/1);
if (r)
return r;
offset = size_binop (PLUS_EXPR, offset,
TYPE_SIZE_UNIT (TREE_TYPE (type)));
/* If this new OFFSET is bigger than the MAX_OFFSET, then
there's no point in iterating through the remaining
elements of the array. */
if (max_offset && INT_CST_LT (max_offset, offset))
break;
}
}
@ -3919,7 +3937,7 @@ record_subobject_offsets (type, offset, offsets, vbases_p)
int vbases_p;
{
walk_subobject_offsets (type, record_subobject_offset, offset,
offsets, vbases_p);
offsets, /*max_offset=*/NULL_TREE, vbases_p);
}
/* Returns non-zero if any of the empty subobjects of TYPE (located at
@ -3933,8 +3951,19 @@ layout_conflict_p (type, offset, offsets, vbases_p)
splay_tree offsets;
int vbases_p;
{
splay_tree_node max_node;
/* Get the node in OFFSETS that indicates the maximum offset where
an empty subobject is located. */
max_node = splay_tree_max (offsets);
/* If there aren't any empty subobjects, then there's no point in
performing this check. */
if (!max_node)
return 0;
return walk_subobject_offsets (type, check_subobject_offset, offset,
offsets, vbases_p);
offsets, (tree) (max_node->key),
vbases_p);
}
/* DECL is a FIELD_DECL corresponding either to a base subobject of a

5
include/ChangeLog
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@ -1,3 +1,8 @@
2001-05-07 Mark Mitchell <mark@codesourcery.com>
* splay-tree.h (splay_tree_max): New function.
(splay_tree_min): Likewise.
2001-04-15 Daniel Berlin <dan@cgsoftware.com>
* ternary.h: New file - Ternary search tree header.

4
include/splay-tree.h
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@ -110,6 +110,10 @@ extern splay_tree_node splay_tree_predecessor
extern splay_tree_node splay_tree_successor
PARAMS((splay_tree,
splay_tree_key));
extern splay_tree_node splay_tree_max
PARAMS((splay_tree));
extern splay_tree_node splay_tree_min
PARAMS((splay_tree));
extern int splay_tree_foreach PARAMS((splay_tree,
splay_tree_foreach_fn,
void*));

5
libiberty/ChangeLog
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@ -1,3 +1,8 @@
2001-05-07 Mark Mitchell <mark@codesourcery.com>
* splay-tree.h (splay_tree_max): New function.
(splay_tree_min): Likewise.
2001-04-15 Daniel Berlin <dan@cgsoftware.com>
* ternary.c: New file - Ternary search tree implementation.

36
libiberty/splay-tree.c
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@ -1,5 +1,5 @@
/* A splay-tree datatype.
Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
Contributed by Mark Mitchell (mark@markmitchell.com).
This file is part of GNU CC.
@ -368,6 +368,40 @@ splay_tree_lookup (sp, key)
return 0;
}
/* Return the node in SP with the greatest key. */
splay_tree_node
splay_tree_max (sp)
splay_tree sp;
{
splay_tree_node n = sp->root;
if (!n)
return NULL;
while (n->right)
n = n->right;
return n;
}
/* Return the node in SP with the smallest key. */
splay_tree_node
splay_tree_min (sp)
splay_tree sp;
{
splay_tree_node n = sp->root;
if (!n)
return NULL;
while (n->left)
n = n->left;
return n;
}
/* Return the immediate predecessor KEY, or NULL if there is no
predecessor. KEY need not be present in the tree. */